[jdk17u-dev] RFR: 8338379: Accesses to class init state should be properly synchronized

[Matt]

8338379: Accesses to class init state should be properly synchronized

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Commit messages:
 - Backport of 6600161ad46fe5b1e742409481bf225cd87f07c9

Changes: https://git.openjdk.org/jdk17u-dev/pull/3317/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3317&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338379
  Stats: 58 lines in 17 files changed: 20 ins; 0 del; 38 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3317.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3317/head:pull/3317

PR: https://git.openjdk.org/jdk17u-dev/pull/3317